SoGLViewingMatrixElement(3)

💖 SoGLViewingMatrixElement(3) 💖

okay bestie, this is a page from the Coin manual, and today's main character is SoGLViewingMatrixElement. Let's get into it 🫶

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✨ NAME ✨

SoGLViewingMatrixElement — the SoGLViewingMatrixElement class is used to store the current viewing matrix. 💅

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🌸 SYNOPSIS 🌸

#include <Inventor/elements/SoGLViewingMatrixElement.h>

Inherits SoViewingMatrixElement. it's giving nepo baby but in a class-hierarchy way, no cap 🦋

💜 Public Member Functions

• virtual void init (SoState *state)
• virtual void push (SoState *state)
• virtual void pop (SoState *state, const SoElement *prevTopElement)

💜 Public Member Functions inherited from SoReplacedElement

• virtual SbBool matches (const SoElement *element) const
• virtual SoElement * copyMatchInfo () const
• SbUniqueId getNodeId () const
• virtual void print (FILE *file) const

💜 Public Member Functions inherited from SoElement

• const SoType getTypeId (void) const
• int getStackIndex (void) const
• void setDepth (const int depth)
• int getDepth (void) const
• virtual ~SoElement ()

💜 Static Public Member Functions

• static SoType getClassTypeId (void)
• static int getClassStackIndex (void)
• static void * createInstance (void)
• static void initClass (void)
• static SbUniqueId getNodeId (SoState *const state)
• static SbMatrix getResetMatrix (SoState *state)

💜 Static Public Member Functions inherited from SoViewingMatrixElement

• static SoType getClassTypeId (void)
• static int getClassStackIndex (void)
• static void * createInstance (void)
• static void initClass (void)
• static void set (SoState *const state, SoNode *const node, const SbMatrix &ViewingMatrix)
  • FIXME: write doc. (the devs literally said "we'll do it later" and honestly? relatable 😭)
• static const SbMatrix & get (SoState *const state)
  • FIXME: write doc. (again 😭 same energy)

💜 Static Public Member Functions inherited from SoReplacedElement

• static SoType getClassTypeId (void)
• static int getClassStackIndex (void)
• static void initClass (void)

💜 Static Public Member Functions inherited from SoElement

• static void initClass (void)
• static SoType getClassTypeId (void)
• static int getClassStackIndex (void)
• static void initElements (void)
• static int getNumStackIndices (void)
• static SoType getIdFromStackIndex (const int stackIndex)

💜 Protected Member Functions

• virtual ~SoGLViewingMatrixElement ()
• virtual void setElt (const SbMatrix &matrix)

💜 Protected Member Functions inherited from SoViewingMatrixElement

• virtual ~SoViewingMatrixElement ()

💜 Protected Member Functions inherited from SoReplacedElement

• virtual ~SoReplacedElement ()

💜 Protected Member Functions inherited from SoElement

• SoElement (void)
• void capture (SoState *const state) const
• virtual void captureThis (SoState *state) const
• void setTypeId (const SoType typeId)
• void setStackIndex (const int index)
• SoElement * getNextInStack (void) const
• SoElement * getNextFree (void) const

💜 Additional Inherited Members

Static Protected Member Functions inherited from SoReplacedElement

• static SoElement * getElement (SoState *const state, const int stackIndex, SoNode *const node)

Static Protected Member Functions inherited from SoElement

• static SoElement * getElement (SoState *const state, const int stackIndex)
• static const SoElement * getConstElement (SoState *const state, const int stackIndex)
• static int createStackIndex (const SoType id)

Protected Attributes inherited from SoViewingMatrixElement

• SbMatrix viewingMatrix

Protected Attributes inherited from SoReplacedElement

• SbUniqueId nodeId

Protected Attributes inherited from SoElement

• SoType typeId
• int stackIndex
• int depth

Static Protected Attributes inherited from SoElement

• static int classStackIndex
• static SoTypeList * stackToType

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🦋 Detailed Description 🦋

The SoGLViewingMatrixElement class is used to store the current viewing matrix. yes, same sentence as the NAME section, they said it twice and honestly it ate 💅

The viewing matrix contains the inverse camera coordinate system matrix. The camera coordinate system is built from the field values in the current SoCamera (currently either SoPerspectiveCamera or SoOrthographicCamera) and any transformations prior to the camera in the scene graph. 🎀

so like. camera stuff. transforms before the camera. the whole vibe. got it bestie ✨

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🌈 Constructor & Destructor Documentation 🌈

SoGLViewingMatrixElement::~SoGLViewingMatrixElement (void ) [protected], [virtual]

Destructor. that's it, that's the whole thing, she's leaving the group chat 👋

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🔥 Member Function Documentation 🔥

SoType SoGLViewingMatrixElement::getClassTypeId (void ) [static]

This static method returns the SoType object associated with objects of this class. iconic type-system behavior ⭐

int SoGLViewingMatrixElement::getClassStackIndex (void ) [static]

This static method returns the state stack index for the class. 📚

void * SoGLViewingMatrixElement::createInstance (void ) [static]

This API member is considered internal to the library, as it is not likely to be of interest to the application programmer. (iykyk — if you're reading this as an app dev, this one's not for you babe 💀)

Creates a new instance of the class type corresponding to the SoType object.

void SoGLViewingMatrixElement::initClass (void ) [static]

Initialize relevant common data for all instances, like the type system. get her set up 💅

void SoGLViewingMatrixElement::init (SoState * state) [virtual]

Initializes the element to its default value. The default value is the identity matrix. ✨

Reimplemented from SoViewingMatrixElement.

void SoGLViewingMatrixElement::push (SoState * state) [virtual]

This method is called every time a new element is required in one of the stacks. This happens when a writable element is requested, using SoState::getElement() or indirectly SoElement::getElement(), and the depth of the current element is less than the state depth.

Override this method if your element needs to copy data from the previous top of stack. The push() method is called on the new element, and the previous element can be found using SoElement::getNextInStack(). 🫶

Reimplemented from SoElement.

void SoGLViewingMatrixElement::pop (SoState * state, const SoElement * prevTopElement) [virtual]

This method is called when the state is popped, and the depth of the element is bigger than the current state depth. pop() is called on the new top of stack, and a pointer to the previous top of stack is passed in prevTopElement.

Override this method if you need to copy some state information from the previous top of stack. 💖

Reimplemented from SoElement.

SbUniqueId SoGLViewingMatrixElement::getNodeId (SoState *const state) [static]

Returns the node id of the current camera node. This is used by SoGLModelMatrixElement to detect a change in the viewing matrix inside an SoTransformSeparator node. 🎥

SbMatrix SoGLViewingMatrixElement::getResetMatrix (SoState * state) [static]

Returns the matrix that should be used by SoGLModelMatrixElement when the transformation should be reset during traversal (typically when encountering an SoResetTransform node). It is not sufficient to simply load the viewing matrix, since the transformations that were applied before the camera needs to be accounted for. 🔄

This function is an extension for Coin, and it is not available in the original SGI Open Inventor v2.1 API. so don't go looking for it there bestie, she's Coin-exclusive 🎀

Since:

• Coin 2.0 ⭐

void SoGLViewingMatrixElement::setElt (const SbMatrix & matrix) [protected], [virtual]

Sets the current viewing matrix. ✨

Reimplemented from SoViewingMatrixElement.

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👑 Author 👑

Generated automatically by Doxygen for Coin from the source code. (no human wrote this section, a robot did, and honestly? she ate 🤖💅)

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okay bestie that's the whole page 🫶 Version 4.0.10, dated Thu Jun 25 2026 00:00:00, straight from the Coin manual, and yes I read every single inherited member so you didn't have to. now go forth and slay your scene graph. periodt. 💖✨🎀🦋🌸💅